Portion of a tray



FIG. 1 is a bottom, rear and right side perspective view of a portion of a tray, showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a left side view thereof, with the right side being a mirror image thereof; and,

FIG. 7 is a top, front and left side perspective view thereof. 

CLAIM The ornamental design for a portion of a tray, as shown and described. 